1D Simulation Engineer

Expleo Group

. Develop, maintain, and apply 1D simulation models for powertrain and thermofluid systems, including intake, exhaust, cooling, lubrication, and energy recovery systems.

Posted 5/5/2026full-timeGuildford • 🇬🇧 United KingdomMid-LevelSeniorWebsite

About the role

Key responsibilities & impact

Develop, maintain, and apply 1D simulation models for powertrain and thermofluid systems, including intake, exhaust, cooling, lubrication, and energy recovery systems.
Work closely with CFD and cross-functional engineering teams to optimise fluid flow and thermal performance across the power unit.
Support concept design and system architecture decisions through simulation-driven insights.
Perform model validation and correlation using test bench and real-world data, ensuring accuracy and predictive capability.
Develop and enhance bespoke and commercial simulation tools, improving modelling fidelity and efficiency.
Analyse large datasets, interpret simulation and test results, and provide clear technical recommendations.
Contribute to development loops, linking simulation, test, and design iterations to drive continuous performance improvements.
Support engine and powertrain testing activities, including collaboration with test engineers to validate simulation outputs.
Document methodologies, assumptions, and results, ensuring traceability and knowledge sharing across teams.
Communicate findings effectively to both technical and non-technical stakeholders.

Requirements

What you’ll need

Degree in Mechanical Engineering, Automotive Engineering, Aerospace Engineering, or a related discipline.
Postgraduate qualification (MSc or PhD) in a relevant field is advantageous.
Strong academic foundation in thermodynamics, fluid mechanics, and heat transfer.
Strong expertise in 1D simulation tools (e.g. GT-SUITE, AMESim, Ricardo WAVE, or similar).
Solid understanding of internal combustion engines, hybrid powertrains, or high-performance propulsion systems.
Knowledge of fluid dynamics and thermal systems modelling.
Experience in model development, calibration, and validation.
Ability to interpret complex data sets and translate findings into actionable engineering insights.
Strong problem-solving capability, particularly when working with incomplete or imperfect data.
Excellent written and verbal communication skills for reporting technical findings.
Ability to work effectively within cross-functional engineering teams.
Experience working on high-performance powertrain development, motorsport, or advanced R&D programmes.
Exposure to simulation-driven development environments, including correlation with test data.
Experience in engine test-bench environments and understanding of test methodologies.
Familiarity with manufacturing considerations and their impact on simulation models.
Experience contributing to iterative development loops between simulation, design, and validation.
Prior involvement in hybrid power unit development or motorsport applications is highly advantageous.

Benefits

Comp & perks

Collaborative working environment – we stand shoulder to shoulder with our clients and our peers through good times and challenges
We empower all passionate technology loving professionals by allowing them to expand their skills and take part in inspiring projects
Expleo Academy - enables you to acquire and develop the right skills by delivering a suite of accredited training courses
Competitive company benefits
Always working as one team, our people are not afraid to think big and challenge the status quo
As a Disability Confident Committed Employer we have committed to: Ensure our recruitment process is inclusive and accessible
Communicating and promoting vacancies
Offering an interview to disabled people who meet the minimum criteria for the job
Anticipating and providing reasonable adjustments as required
Supporting any existing employee who acquires a disability or long term health condition, enabling them to stay in work

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills & Tools

1D simulation modelsthermodynamicsfluid mechanicsheat transfermodel developmentcalibrationvalidationdata analysissimulation toolsinternal combustion engines

Soft Skills

problem-solvingcommunicationcollaborationtechnical recommendationsknowledge sharinginterpretation of complex datacross-functional teamworkreportingcontinuous performance improvementadaptability

Certifications

MScPhDdegree in Mechanical Engineeringdegree in Automotive Engineeringdegree in Aerospace Engineering